The reason I'm not on the same page here is something that the Deputy Speaker said when I was listening. I've just gone back in the broadcast to about 18:15 or so and she says the following in response to the SNP's point of order:
"There were going to be, as I understood it, three votes tonight. The government has withdrawn from that. The consequence is, as the right honorable gentleman says, that if the...if the Labour Party amendment is passed it is then added to the SNP motion so he [SNP leader] is right to say, if there were a division, there would be just one vote but if it goes through then we move on to the next business."
I understood the "three votes" to be the SNP motion and the two amendments. Clear as mud to me.